Outliner Lighto is a console-based outliner/hierarchical editor. An outliner is used to edit an hierarchy of text (a tree with text in every node). This hierarchy can represent anything the user wants, like TODO lists, calendar, tasks, address book, bookmarks, etc. It is based on FreePascal's video and keyboard units.
AutOrg aims to be a text editor, personal organizer, local wiki, secure agenda, and everything in between. For the user interface, it gets its inspiration from text-based minimalism, still providing advanced features for publishing, encrypting, and sharing information. It uses Emacs Org-mode and other extensions, and its main binary distribution runs on a Mac OS X desktop.
Wieldy is a to-do list manager that is based on the principles of GTD (Getting Things Done). It allows you to manage your to-dos in a simple but effective way. To-dos can be created as thoughts and actions, which can then be assigned to the Next Action, Today, or Someday categories. Tasks can also be scheduled and listed in a calender-like overview, as well as linked to a project or simply put on hold. Wieldy also allows you to manage your contacts and delegate actions to them. Other features include support for data encryption, tagging, priorities, recurring action templates, and synchronization with other PIMs like Outlook. No installation is needed.